Door lock for elevators



Mar. 20, 1923.

. 1,448,776. F. F. TURNER.

DOOR LOCK FOR ELEVATORS. VHLE'D JAN. 6. 19.21:

Patented Mar. 20, 1923.

To all whom it may concern citizen of the residing iave invented til 1,443,??6 PATENT OFFEQE.

FLOYD F. TURNER, OF TOLEDO,

OHIO, ASS MACHINE 00., OF TOLEDO, OHIO, A CORPORATION IGNOR TO THE HAUGHTON ELEVATOR &

OF OHIO.

DOOR LOOK FOR ELEVATORS.

Application filed January 6, 1921.

that I, FLOYD F. TURNER, a United States of America, at Toledo, Lucas County, Ohio, new and useful Door Locks of which the following is a Be i t known r Elevators, ecification. i This invention relates to a control or con trol and lock or looks for doors or gates.

connection with an This invention has utility when incorpoted for restricted operation, especially in interlock for slidable landing doors for elevators;

lock feature of an Referring to the drawings Fig. l is a wiringdiagrain of the interembodiment of the inntion;

'Fig. 2 is a view with parts broken away the landing door having the doorcoacting mechanism associated therewith;

F i th Fig. 3 is a e lock;

Fig. 4 is a side elevation of the lock of g. 3, showing the interlock associated erewith, with the door in closed position; Fig. 5 is a fragmei'itary View ofthe lock plan view of features of and interlock shifted by door opening;

Fig. 6 is a fragmentary view showing attempt at door shift, with the lock holding e door against such shifting; and F ig, 7 is a section on line VII-VII,

Fig. 4-.

Elevator shaft 1 is shown as provided with a plurality of landings 2. In this shaft 1 is disposed elevator line 8 past terminals car 3 having controller central line which extends from supply Shifting of the controller 4 say to current to flow from tween lines 6 and by terminal 7 through 9, 10, closed by interlock switches 11 to energize coil 12 to main switch 13, for this from the coil 12 to circuit, is completed main supply line 14.

In this shifting of the controller 4 for updirection travel, the next position connec tions to line switch @011 16 15 energizing up-direction of up-direction switch 17,

which permits current flow from power supply lines 14, 18, to main elevator driving motor 19, a third line being-connected thereby main switch 12. This main elevator motor 19 is on shaft 20 connected to drive drum 21 having line 22 extending to elevator r 3. This line 22 passingabout the drum extends; to counterweight 23. For re Serial No. 435,383.

verse of current and direction travel of the elevator car 3 in the elevator shaft 1, the controller 4 is thrown in the opposite direction. The first contact 24 connects to main direction switch 12 by line 8 past interlock switches 11, while further throwing of this controller 4 to line 25 serves to energize coil 26 of Lip-direction switch 27 for reversing the supply of current to the motor 19 in effecting downward direction driving for the car 3 in the shaft 1.

Access to the car 3 at'thelandings 2 is normally closed by landing door 28 mounted to slide in guides 29 (Fig. 2). The landing door or gate 28 is herein shown as provided with a ledge or cam 30 upon which is disposed to rest bar 31 having offset portion 32 to a horizontally extending portion 33 having slot 34 therein. This bar 31 normally rests upon the ledge 30 of the elevator landing door 28,and as the door 28 is shifted toward closed position, this ledge 30 coacts with projection 34 in shifting the bar 31 in the direction the door is traveling toward closed position. This shifting causes pin to move in the slot 34 toward the offset portion 32 of this bar 31. In an opening movement of the door 28, the ledge 30 remote fromthe projection 34' strikes incline 36 of the bar 31 and with the bar not intercepted, this incline 36 is of such pitch that this bar 31 is, in the continued opening movement of the-door, shifted along with the door 28, as the weight of the bar and the angle of friction of the incline 36 are suflicient to have it so move for a short distance, say one or two inches. Then the bar 31 engages downwardly extending latch 37 on bar38 parallel to this bar 31. This bar 38 is an arm of an angle lever having a fixed bearing 39 carrying bar 40 extending transversely to the arm 38 and to which the arm 38 is connected by pins 41 in the line of the bar 31, and slightly above the fixed fulcrum 39.

Nuts 42 serve to fix in the slot 34 of the horizontal portion 33 of the bar 31 a pivot pin 43 which has loosely mounted thereon andspaced from the bar 31 a trigger 44 normally held in horizontal position by counterweight 45. vVhen the door 28 is pulled toward opened position, and the car 3 is within a determined range of a landing 2, say in a push button installation within three or four inches of the floor either terceptor carried by the car, and movable means with which the interceptor may coact when the car is at the landing for holding the lock for door release, said movable means being rockable by the interceptor up-' on door release attempt during car travel past the landing, thereby rendering the lock effective to hold the (door against opening2 0 under such condition.

In Witness whereof I aifix my signature.

FLOYD F. TURNER. 

